Mechanism for the manufacture of envelopes with pasted-in windows



' g- .3{ A. WINKLER E1 AL 10 MECHANISM FOR THE MANUFACTURE OF ENVELOPES WITH I'ASTED-IN WINDOWS Filed Nov. 25, 1950 2 Sheets-Sheet 1 d a a H 0 WW wkm Mm Wm U Aug. 18, 1936. v WINKLER q 2,051,510

MECFIANISM FOR THE MANUFACTURE OF ENVELQPES WITH PASTED-IN WINDOWS Filed NOV. 25, 1930 2 Sheets-Sheet 2 /n Yen 'l'O/S ,q/fred Winkle! Patented Aug. 18, 1936 MECHANISM FOR. 'rnE MANUFACTURE or ENvELoPEswrrn Pss'mmm'wmnows Alfred Winkler and Max Diinnebier,

Neuwied, Germany Application November 25, 1930, Serial No. 498,022

Germany November 25, 1929 I Y 9 Claims: (01. as -s1) This invention relates to mechanism for the manufacture of envelopes with pasted-in windows or with internal linings.

The pasting-in of transparent windows or of a special lining paper into envelopes, flat bags and similar articles has heretofore been effected prior to the folding in a special operation, preceded in the case of window pasting by the stamping out of the window opening in a separate operation. The pasting-in of the windows or of the lining paper has heretofore been effected by the use of special machines, as well as by hand work. This results not only in increasing the cost and the difiiculty of the entire manufacturing process, but even when separate machines are used for pasting in the window or'the lining, the quality or uniformity of the goods is not improved because it is necessary to again stack the envelopes in the gumming machine each time so that even with the most skillful operators, irregularities result, thus causing a lack of neatnessin the finished work, and also entailing a great deal of waste.

One object of the present invention is to provide means whereby the stamping out of the win dow openings and the pasting in of the windows, or the pasting in of the lining is effected either in one operation with the folding of the envelopes or with the gumming of the closure flaps and the folding of the envelopes. In addition to a substantial reduction in the manufacturing cost this results in the production of uniform goods with a minimum amount of waste, because the blanks are handled with only a single stacking in the machine and because the blanks are effectively guided from the beginning of the manufacturing process until its end.

A further object a is the provision of means whereby the feeding of the windows -orof the lining paper to the blank, and, its pasting thereon takes place by a continuous revolving suction roller which is so driven that its revolving speed coincides with the speed at which the blank is moving. v

0n drawings an example of the mechanism according to the invention is shown. In this connection it'is assumed that an envelope roller folding machine combined directly with a gum spreading machine is connected with the means for stamping out the window opening and pasting on ,the' window or for pastingv on lining the drawing, Fig. 1 is a side elevation partly in section of the left-hand portion of the machine, and Fig. 1a is a similar view of the righthand portion of thesam'e machine.

At Figs. 1, 1a of the drawing, Aisithe blank feeding and gumming mechanism, B is the gumdrying belts, C is the mechanism for the application of the windows and inner linings, Dis the folding mechanism, and E is the receiving'and stacking mechanism for the completed envelopes.

In the mechanism A, which is preferably of the form shown in our prior U. S. Patent No. 1,396,906, or of other like form, the envelope blanks 30 are carried in a stack a from which they are fed'by a sucker device 3I and are carried in overlapping relation between the rollers 32, 32' to the rollers 33, 33'-to the rollers 34, 34' by which they are fed to the gummingbelts 35, 35; the former of which are carried on rollers 36, 31 while the latter arecarried on rollers 33, 39, '40; a gumming device 42 cooperating with a support 4I in'the known manner; From the gumming, belts 35, 35' the blanks pass to the drying belts I,. I as in the machine shown in the said patent. In the present machine the belts I are carried on pulleys 41 and 43 and over guide pulleys 46, 45 and 44 and over a support it, while the belts I" are carried on guide pulleys 53, 52, 5I,'50, 49, and 48;

The belts I and I' carry the blanks from the gum spreading machine with such blanks arranged .in overlapping relation to expose only a little more than the gummed portions thereof. Above the belt I, are provided adjustable delivery rollers 3-which are mounted in the known manner by means of a stem 3 adiustably secured in a bracket on a cross-bar 3", and which rollers deliver the blanks successively to an intermediate belt 4 and to counter-rollers-lland 'I co-oper-' ating therewith. This belt 4 is carried on pulleys 55, 56, has a supporting table 51 and is driven at such a speed that when it receives the closely over-lapping blanks it pulls them suiiiciently far apart ,to expose the surfacedntended' for the window andalso exposes the corners which lie to the rear as regards the direction of movement or, the blank and whichare formed by the unfolded clodng flaps and the side flaps. Each individual blank is then receivedby the roller pair 8, 3 revolving at the same speed as thebelt 4 and is conveyed such a distance that-its corners lying in pair 0, 8 by movement of a carrier having a toothed rack engaged and actuated by a pinion BIL-after the fingers II have been swung into engagement with the blank by means of the crank II and its operating rod I I". The blank is thus accurately adjusted in the longitudinal and crosswise directions. In this straightened out position the work comes to a stop temporarily, and this is utilized for the stamping out of the window opening by means of the stamping devices I2 which comprises a movable cutting member I2 carried on a member 5i mounted on a slide 82 working in a vertical guide 53 which latter is connected to a lever actuated at the proper time by a. link 55 in any suitable or wellknown manner. After the window opening is thus formed the blank is seized by the two rollers I 3 and I4 the upper ()of which is suitably recessed or notched out at I4 to receive the bottom flap point at the proper time, and the blank is then fed to a device for applying the adhesive for pasting on the window. This device consists of a type roller I5 which receives the adhesive from an adhesive-container I8 by means of a coating rgoller I6 and a lifting roller I1. The blank is provided in this manner with adhesive all around the window opening and is now guided by means of sets of cooperating rollers comprising lower rollers 10 and upper swinging rollers 10' to the window pasting device consisting of a roller pair I0 and 20, whose upper roller I5 is provided with suction means and seizes the window sheet with the aid of suction openings 2| in a duct 11, and conveys it to the blank between the rollers I0, 20. For that purpose the roller I5 is so driven that its circumferential speed coincides with. the speed at which the blank is moving and is so timed that it places the window sheet on the window opening in exactly the right place and presses it on at the same time.

The blank which. is now provided with the I window may then be conducted, through a drying device if this is n, or to the conveying belts 23 and guide rollers 22 of the folding machine.

When envelopes with pasted-in lining are to be manufactured, the operation is exactly the same as described above, and all that is necessary is to disconnect or stop the stamping device I2 and use a gumming type I5 of a contour suitable for the purpose.

In the example shown it is assumed that the blanks are fed from gum spreading mechanism for the application of the gum to the closing flaps, but the blanks may of course be fed in the proper overlapping relation direct from a stack by feed mechanism of any suitable or well known form.

In the example drawn it is assumed that the sheet used for the window or for the lining is taken directly from a paper roll 28 by intermittently operated roller pairs 25, 21, and by means of a belt 12 carried on the said roller I8 and over guide pulleys 13 and 1|, and cooperating with a supporting table 15 and with rollers 24, 25. Cutting means comprising a lower fixed blade 28' and an upper movable blade 29 are also provided to sever the paper strip H from the said roll 28, as the blade 2! is lowered at the proper time by the cam or like mechanism shown in dotted lines at 16, 16' with a connecting rod 15 extending to the blade 29. The intennittent motion of the roller 25 is effected through the medium of a shaft I25 which by means of skew gears 10, 18 imparts continuous rotation to a shaft 80 which carries a disc 8| for the actuation of a Geneva of suitable drying apparatus comprising a duct.

80, a chamber 88, and air outlets 80, or other apparatus of well-known form. This drying apparatus 80. 08 forms no part of the present invention and is of the conventional form commonly employed for drying the gum on envelope flaps and for other like purposes in machines of this general type.

The envelope folding, receiving and stacking apparatus shown at D, E, Fig. 1 of the drawing is of a type well known in the art, and the specific parts of this mechanism form no part of the present invention and are shown here only for the purpose of illustration or example and to provide a complete disclosure of the entire machine. The folding mechanism D and the receiving and stacking mechanism E, may be of the form shown in our prior U. S. Patent No. 1,884,468 or in the patent to Novick No. 1,807,867.

From the belt 23 the blanks pass between rollers 0|, 02 actuated by. a gear I29 and in the well known manner the blanks are adjusted or straightened by means of the well-known swinging fingers 83, 94 before passing to the roller 85, 86 and as the blanks are-advanced towards the left in Fig. 1, the folding appliances IIII, 81, 80, I02 perform their proper functions after which the blanks pass between the rollers 09, I00'and between the rollers I08, I04, and after passing beneath the gumming sector I05, the blanks pass between the rollers I05, I01 and are engaged by the flap-folding member H0 and by actuation ofthe parts I", I05, I08, Ill, 5 and I inthe which latter in turn actuates a transverse shaft I28 through the medium of the bevel gears I25, I21. The said shaft I25 is also provided with bevel gears Ill, I22 for the actuation of a transverse shaft I 80 which latter imparts movement to a longitudinal shaft I35 through the medium of skew gears I 35, I34 and the said shaft I35 in turn drives a worm I25 which actuates a worm wheel I31 on the shaft of the pulley 43 carrying the drying belts.

What We claim is:

1. In an envelope folding machine, mechanism for the provision of pasted-in windows interposed between mechanism for feeding the blanks in overlapping relation and mechanism for folding the flaps, comprising means for drawing the blanks away from each other, means for adjusting the position of the blanks, means for stamping out the window openings in the adjusted blanks, means for the application of gum to the blanks, means-for the application of the windows conveying the individual blanks directly to the folding mechanism.

2. In an envelope folding machine, mechanism for the provision of pasted-in windows interposed between mechanism for feeding the blanks in overlapping relation and mechanism for folding the flaps, comprising means for drawing out the blanks to expose the front and rear corners thereof between adjacent flaps, means for engaging said corners to adjust the blanks in a longitudinal and crosswise direction, means for stamping out the window opening in the adjusted blanks, gum typing means for the application of adhesive to the blanks, rotary means for the application of window paper to the blanks and means for receiving and conveying the individual blanks directly to the folding mechanism.

3. In an envelope folding machine, mechanism for the provision of pasted-in windows interposed between mechanism for feeding the blanks in overlapping relation and mechanism for folding the flaps, comprising means for drawing the blanks successively away from each other, means for adjusting the position of the blanks, means for stamping out the window opening in the adjusted blanks, typing means for the application of gum to the blanks, means for the delivery and application of the windows to said openings and means for receiving and conveying the blanks to the folding mechanism.

4. In an envelope folding machine, mechanism for the provision of pasted-in windows interposed between mechanism for spreading the gum on the flaps of the envelopes and mechanism for folding the flaps, comprising means for conveying the blanks in closely overlapping relation from the gum spreading mechanism, means for drawing out the blanks successively'to expose the front and rear corners thereof between adjacent flaps,

means for engaging said corners to adjust the blanks in a longitudinal and crosswise direction, means for stamping out the window opening in the adjusted blanks, gum typing means for the application of adhesive to the blanks, rotary means for the application of window paper to the adhesive upon the blanks and means for receiving and conveying the blanks to the folding mechanism.

5. In an envelope folding machine, mechanism for the provision of pasted-in windows interposed between the mechanism for spreading the gum on the fiaps of the envelopes and the mechanism for folding the fiaps, comprising means for feeding the blanks from the gum spreading mechanism, movable fingers for engaging the corners of the blanks to adjust them in position, means for forming the window opening in the blanks while engaged by said fingers, rotary gum typing mechanism for the application of adhesive to the blanks, means for feeding the blanks beneath said gum typing mechanism, rotary means for the application of window paper to the blanks, means for severing the said paper into lengths and means for receiving the individual blanks with the said paper thereon and for delivering same directly to the envelope folding mechanism plication of window paper to the adhesive upon a the blanks and means for separating the window paper into lengths for delivery to said suction mechanism.

7. In an envelope folding machine, mechanism for the provision of pasted-in windows interposed between the mechanism for spreading the gum on the flaps of the envelopes and the mechanism for folding the flaps, comprising means for feeding the blanks from the gum spreading mechanism in closely overlapping relation, means for successivelydrawing out the blanks, movable fingers for engaging the corners of the drawn out blanks to adjust them in position, stamping means for forming the window opening in the blanks while engaged by said fingers, rotary gum typing mechanism for the application of adhesive to the blanks, means for feeding the blanks beneath said gum typing mechanism and a rotary cylinder for the application of window paper to the blanks, means for severing the said paper into lengths and means for receiving the blanks with the said paper thereon and for delivering same to the envelope folding mechanism.

8. In an envelope folding for the provision of pasted-in windows interposed between the mechanism for spreading-the gum on the flaps of the envelopes and the mechanism for folding the flaps, comprising means for conveying the envelope blanks from the gumming mechanism to the folding mechanism, means for separating the blanks during such conveyance, means for forming the window openings, means for the application of adhesive to the blanks after the formation of said'openings, rotary suction mechanism for the application of window paper to the adhesive upon the blanks, means for separating the window paper into lengths for delivery to said suction mechanism, and a supply roll for the supply of such paper to the separating means.

9. A machine for making window envelopes comprising mechanism for advancing a series of blanks in overlapping relation, means for detaching the foremost blank of said series and speeding it up so as to space it from said series, means for temporarily arresting the so detached machine, mechanism blank, a punch and die mechanism for cutting MAX DflNNEBIF-R.

WINKLER. 

